Section E25 - Hydraulics Rams

Dismantle and Assemble

c Ensure the O-ring is fitted into the internal seal groove on the piston head. Screw the piston head onto the thread of the piston rod, refer to the relevant section for torque figure and completion of ram assembly.

d Fit the piston head retaining dowel, refer to the relevant section for torque figure and completion of ram assembly.

e Fit wear rings 29-A and 29-B. Rotate the wear rings so that the piston retention dowel is covered by the wear ring, Not as shown at 29-C a Use a blunt instrument 28-A (Part no. 892/01027) to lever the inner seal 28-B into the piston head seal groove. Do not let the seal twist. There are identification marks on the outer diameter of the seal, make sure the marks are visible and the seal is free to rotate, if not remove the seal and refit. a Insert the piston/rod assembly into the cylinder. Align the rod and head assembly until parallel with the cylinder then push the assembly into the cylinder. b Fit the end cap, refer to the relevant section for torque figure and completion of ram assembly. b Fit outer seal 28-C using the same procedure as stated for seal 28-B. Check the external grooves are visible.

2 Fit new head piston seals.

3 Fit the piston rod and head assembly into the cylinder.

E25-34

9813/0250-07 (E-24-04)

E25-34